Ouch.

code/modules/projectiles/guns/misc/beam_rifle.dm

@@ -569,4 +569,4 @@
 
 /obj/item/projectile/beam/beam_rifle/hitscan/aiming_beam/on_hit()
 	qdel(src)
-	return FALSE
+	return BULLET_ACT_HIT

code/modules/projectiles/guns/misc/blastcannon.dm

@@ -114,7 +114,7 @@
 	icon_state = "blastwave"
 	damage = 0
 	nodamage = FALSE
-	forcedodge = TRUE
+	movement_type = FLYING | UNSTOPPABLE
 	var/heavyr = 0
 	var/mediumr = 0
 	var/lightr = 0